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Don't understand the confusion over risk of buying a used CRO What a lot of people are forgetting, is that if the seller claims that the scope was tested and works, there is little risk. If you are a beginner, don't buy an as is scope. Fixing them can be dangerous if you don't know what you are doing. All the negative attention in these threads regard the risk of buying a AS IS scope. Buy a TESTED WORKING scope like I did, and you will be fine.

Beamin, if you live near universities, ask them if they do not need/are chucking their old oscilloscopes. I did, got a 2235 for free. A free working CRO is better than no scope.

I've been pondering this lately and I'm sure there's someone here with experience in this field. So we know that the charging circuitry in modern smartphones charges the Li batteries inside with constant current up until some voltage and then switches to constant voltage charging. The problem I'm having is with the current limit on the USB 2.0 ports on your PC which are limited to 0.5A, 5V (2.5W). So suppose we're capable of charging our Lithium cells at 2A and our current battery voltage is 3.6V and we're charging in constant current mode. This means that we can supply ~ 7.2W. Assume it's 100% efficient.

As you can see this presents problems. The input is limited in power. So how does the charging circuitry inside the phone KNOW how much power it can draw before the input supply droops?

Programmer works in Win10 64 bit and so I believe it should work in Win7 too. Might be something in your settings and not the programmer software. Why not D/L a new copy of the Windows software and reinstall it.

I use plastic spring clamps to make a tripod, but for anything that is likely to need a more strurdy or permanent connection, I get the hot pointy thing out and add a short through-hole component lead I can clip on to.

For high speed probing I make up a coaxial spring setup for ground and testpoint out of wound through-hole component leads so that the probe can be slipped in.

For differential high speed probing such as USB HS speeds and above, it’s typically a jury rig with elastic bands and/or kapton tape to hold the bulk of the probe and judicious tip browser adjustment. If the signal is designed to run over a cable, I make up a very short M/F breakout to intercept the signal where I can probe.